Spark-arrester.



W. R. HALL.

SPARK ARRESTEB..

ARPLIGATION FILED APRA, 1914.

LQYQQ. Patented Feb.9, 1915.

7HE NORRIS PETERS co., PHOTG-LVTHO., WASHING rDN. D. C.

eraan-Amener,

vspeci',ieatitni of Letters :Patent Patented Een? 9a wie AApplicationiledAprl 4, 1914. Serial No. 829,719.

To .all whomz't .may @andere Be it known that I, WILLIAM B. HALL, acitizen `of the United States, residing at 'Warnen inthe county `ofMerrimackand State of `New Hampshire,lhave invented certain new anduseful `Improvements in Spark-Arresters, of which the following 1s aspecification.

4The 4present Spark arrester invention 1 s designed as an improvement onmy previous Patent No. 1,016,069 dated January 30, 1912,/ the object inview being to provide a more veiiicient device and compact arrange mentembodying agitating means for dislodging the soot and sparks `which arecollected by the baffle member of said device.

`in .carrying out myv invention I employ in conjunction with a `baiiiemember an agitatOI of Special form comprising a fan revo lubly mountedin the .baflie and carrying knoclrerelements designed to contact .withthe batlie. to loosen foreign matter adhering thereto `when the fan isoperated, the latter member effectively removing away from the batliesaid foreign matter after dislodgment.

A further object of my device is to provide operating `means for theagitator so constructed as to `facilitate the assembling and dismantlingof the parts of the device, saidoperat-ing means beingarranged to interlockingly coperate when in normal operativeposition to maintain theproper relative position of the operatingelements.

Itawill be obvious to those skilled in the art lthat vchanges maybereadily made in the details of construction and conformation of thedevice according tothe use to which it is to be put without departingfrom the spirit of the invention, and within thescope of the appendedclaims.

Reference will now be had` to the accomm panying `drawings forming apart of this specification, wherein:

Figure l is aside `elevation of a device embodying my invention partlybroken away and in sectionto shovvmere clearly the details ofconstruction. Fig. 2 is an end elevation partly broken away and insection of the operatngmechanism. Fig. 4 is a top plan view of theinvention. Fig. 5 is a detail plan view of the journal bar for theagitator.

Throughout the following detail description, and on the several figuresof the drawings, similar parts are referred to bylike referencecharacters.

Referring to the drawing and describing specificallythe deviceillustrated thereby, the Vnumeral 1 designates a baiiie kor cage similarto that of my previous patent and having a band 2 at its upper open endfor supporting they operating mechanism of the device. Vtithin thebaii'le and substantially conforming to the shape of the same is.disposed an agitator .which consists essentially of a fan 3 secured upona pivot l in any desired manner and having connected to its lateraledges the knocking elements 5. The pivot a of the fan is formed with a.trunnion 4 at .its lower extremity which is. journaled in aV bearing 6disposed in the lower conical extremity of the baffle while the upperend of the pvot 4 has its bearing in a horizontal transverse bar 7 mostdistinctly shown in Fig. 5 of the drawing. This bar is disposed in thelower .portions of thespaced standards 8, 8 secured to the band 2 bymeans of rivets 9, or similar fastening members and "furthermore thebaris `provided with an open ended and curved slot 10 in which the upperextremity of the pivot l for the agitator is normally disposed when thismemberis Vin proper operative position within the baffle. The `upperextremity of the `pivot a is provided with a beveled pinion 11 by meansof` which, the agitator is adapted to be rotated, in a manner moreclearly described hereinafter.

The operating means for .rotating` the agitator consists of a shaft orspindleil journaled in the upper portions of the standards, 8 which aresuitably apertured to permit of insertion of said shaft by longitudinalmovement thereinto. The shaft 12 carries a driving gear 13 which ismounted for longitudinal movement with respect to the shaft and when inan operative position is connected for rotation withA the shaft by aspline or lug lilformed on the latter, said spline engaging in a recessin` the hub of the gear for interlocking connection of the latter withthe shaft as most clearly depicted in Fig. 1 of the drawing. Thestandard 18 is suitably formed with a slot or aperture 15 to permit thepassage of the spline lt therethrough in assembling the parts for propercooperation in the actual us?v of the device. One extremity of the shaftis provided with a crank 16 for imparting rotation to the shaft when theagitator is to be operated. The opposite end of the shaft 12 is providedwith a locking member 17 for retaining the shaft in position on thestandards 8, 8 and this locking member performs a peculiar function inthat it maintains the operating parts of the device in their propercooperative relationwith respect to each other as will be apparent fromthe foregoing description and reference to the drawing.

In assembling the device, as hereinbefore inferred, the agitator 3 isdisposed within the baliie 1, its pivot 4 being properly positioned inthe lower bearing 6 and the upper bearing bar 7, whereupon the shaft 12is inserted in the standard 8 the gear 13 being then slipped upon theshaft which is finally passed through the aperture of the oppositestandard 8. The longitudinal movement of the shaft into .this positionbrings the spline 14 into coperation with the hub of the gear and byslipping said spline into the recess Aof said hub the gear is locked forrotation therewith. Furthermore, the complete longitudinal movement ofthe shaft 12 as `above described forces the gear 13 into intermeshingrelation with the inion 11 whereupon the locking member 1 is insertedand the elements locked in lproper operative position.

As shown in Fig. 1 of the drawing, the knocking elements' are movablyconnected to the lateral edges of the'fan 3 and consist in this instanceof ring members or short pieces of chain secured in the apertures 3. Anysuitable number of these knockers may be employed and I do not wish tobe confined tothe particular nature of knocker elements illustratedsince it is entirely within the purview of the invention to employvarious other members of a similar nature which will perform thefunction hereinafter set forth.

When the baffle or cage 1 becomes coated with soot and'other byproductsof combus- .tion which usually pass through the passage in which adevice of this character is disposed, said foreign matter may be readilyand quickly dislodged therefrom by impart ing rotation to the shaft 12which, through the gearing, will cause the agitator to revolve and suchrevolution of the agitator will throw the knocker members 5 into contactwith the baie thereby dislodging such timate contact of the knockerelements of the baffle in the revolution of the agitator Within the sameinsures complete removal of adhering sparks and soot therefrom and amost efficient device is thus provided.

It will be apparent that the invention hereinafter described may be madeof such conformation and size as to permit of its disposition withinstove pipes, chimneys, or fireboxes as may be desired and if thedisposition of the arrangement is such as to require 'the same anysuitable operating connection may be provided for the shaft 12 to enablethe operator to rotate the same. This connection I have shown in thedrawing to consist of a sprocket and chain 18 and 19 respectivelyleading to a convenient point of access. I desire also not to be limitedto the use of a single fan tree as it is clearly within this inventionto provide a fan which is constructed within several wings and whichwould accomplish the same function as hereinbefore described withreference to the preferred form.

Having thus described my invention, what I claim as new is:

1. In a spark arrester, the combination of a baflie, agitating meanscooperating therewith and comprising knocker elements adapted to impartblows to the baiiio for dislodging matter from the baille, and means foroperating said knocker elements, said means forcibly removing away fromthe baflie said dislodged matter.

2. In a spark arrester, the combination of a baffle, agitating meanscooperating therewith and comprising knocker elements adapted to impartagainst the bailie for dislodging matter from the baille, means carryingsaid knocker elements adjacent to the latter when inoperative andarranged to cause the same to contact with the baffle upon operation ofsaid means, and means for operating the carrying means.

3. In a spark arrester, the combination of a baffle, agitating meanscooperating therewith and comprising a rotatable member journaled withinthe baliie, a plurality of knocker elements loosely connected to therotatable member, and means for rotating the rotatable member to causeimpact of the knocker elements on the baliie.

In testimony whereof I aiIiX my signature in presence of two witnesses.

WILLIAM R. HALL. Witnesses:

ANDREW J. Hook, FANNm A. HALL.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents, Washington, D. C.

